Charles c



(No Model.)

G. '0. DAWSON. NUT LOCK.

Patented-Peb. 2,4 41892.

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NITED STATES PATENT OFFICE.

CHARLES C. DAVISON, OF MONCTON, CANADA, ASSIGNOR OF THREE-FOURNIS TO JOSEPH A. HARRIS, OF SAME PLACE.

N U T LO C K SPECIFICATION forming part of Letters Patent No. 467,925, dated February 2, 1892. Application filed February 3, 1891. Serial No. 380,093. (No model.)

To all whom it may concern: ed hole and from its center outward is cut a Ile it known that I, CHARLES C. DAVIsON, radial incision to the end or outer edge of of the city of Moncton, in the county of lVestsaid plate. The divided parts are then bent inoreland, Province of New Brunswick, and or deflected in opposite directions to form 55 5 Dominion of Canada,haveinventedanewand several springs or bearings on either side of useful Improvement in Nut-Locks or Fastensaid incision, after which the plate is bent ings for Nuts on Bolts, of which the followover to form a V-shaped spring. The nuting, taken in connection with the accompanylock thus constructed is screwed on the bolt ing drawings, forms an exact, full, and clear over and outside the nut by means of the 6o 1o specification thereof. thread in the bolt-hole of one arm of the My invention relates to nut-locks or fastenplate, the larger opening being next the nut, ings for nuts on bolts which screw on the bolt while the threaded arm will be outside. after the nut. Figure l represents the plate cut in the I am aware that previous to my invention manner described, showing the threaded-hole, 65

15 nuts have been secured or locked by means the plain opening, and the incision. Fig. 2 cfa device bearing some resemblance to mine, shows the manner in which the edges at the inasmuch as a V-shaped springwas employed end of said plate. are curved or deflected to with straight thread out on one arm and an form thesprings. Fig. 3 reprcsentsaside secopen hole of larger diameter cut on the other tion and shows the plate after it has been bent 7o 2o arm of the V, which latter arm was placed into proper shape to form the nut-lock. Figs.

next the nut to allow the spring or hinge of 4 and 5 show under and top views of the dethe V to playand bind against the nut while vice. Figs. G, 7, and S show it in different the threaded arm was set to hold the same in views on a bolt and nut ready for operation. position; but there are difficulties in this de- Similar letters will refer to similar parts. 75

z 5 vice which mine is designed to overcome, and The nut-lock is made, preferably, of springwhich will be apparent on referring to the steel, or such metal as will give the required drawings and the description which follows. strength and elasticity, and its general dimen- I attain the object of my invention by insions are such as to suit the work it is to pertroducing in one of the arms of the V an inform. The hexagonal form, as shown, has 8O 3o clined thread cut on a suitable angle from been found to be more favorable to the operathe thread on the bolt and by making an intion of springs. i oision in the other arm, so as to enable double In operating this device it will be found that springs to be formed by turning one edge inclining or cutting the thread b at an anthereof up and the other edge down, or formgle from the bolt and face of the nut produces 35 ing several bearings by deflecting the edges a better result. The use of this inclined thereof in opposite directions, thus combinthread is a part of my novelty when takenin ing the V-spring and the several other springs connection with the springs or bearings, and or bearings so formed with the said inclined when this thread is properly cut the upper thread in the upper arm, by which means a arm of the nut-lock should stand at an inward 9o 4o fourfold pressure upon the nut and bolt is incline on the bolt from the heel or bend of produced without deiiecting the bolt. the V.

The locking-plate is constructed of a fiat Idesignate the nut-lockacompound plate, piece of spring-steel of suitable thickness, in from the fact thatit consists of two connected which is cut two holes at proper distances arms or members formingaspring-hinge, one 95 45 from each other, and in one of which holes an having a threaded hole and the other having inclined thread is cut to engage the bolt on an enlarged opening, and the two deiiected an angle to its axis, or, if desired, said thread springs adapted to contact, respectively, with maybe cut straight; but the inclined thread the bolt and the nut, as well as with the outer greatly tends to prevent any reverse movearm or member of the plate,when it is screwed roo 5o ment of the nut or nut-lock. In the other on bolt P by means of the thread h on the end a larger opening is made than the threadarm fo, the arm y lying next to nut N. The

arm y being provided with the deflected springs at E and F, will press against nut N, the downward spring bearing against it, while the upper spring will bear against the threaded outer arm of the compound plate when the threaded-arm is screwed up or tightened against it. The spring at S will cooperate with the said springs at E and`F as the nut-lock is rotated, thus producing a compound pressure and frictional contact upon both bolt and nut at suitable points, so that when the nut-lock is thoroughly set the several springs will bear together upon thenut and bolt while the inclined thread will exert its pressure and serve to bind the nutwhile Lit tightens springs E and F, and increase the -frictional contact, thus imparting to the device a most thorough compound locking pressure. lVith such a construction and operation it will be perceived that the nut can be securelylocked against movement in any direction and that the jamming action of the parts upon both nut and bolt must tend to fix the nut i-n a permanent position.

Hav-ing thus described my invention, I claim as new and desire to secure by Letters Patent the following:

l. In a nut-lock such as herein described, the combination of the bolt and nut with a steel plate bent into spring shape, forming a V in cross-sectiomand applied to the boltexteriorly of the nut, the outer arm of which is provided with a thread cut at an angle to the face of thefnut and the axis of the boltto engage the bolt on a slight incline and exert au increased frietional contact upon t-he nutand bolt, the inner arm of said spring-plate having a hole of larger diameter than the threaded hole, the inner arm of said spring-plate being provided with two springs, deflected in opposite directions and operatingl in connection with the hinge or V Spring, the parts working in combination to. produce a compound frictional Contact with the nut and bolt and impinge forcibly against the outer face of the nut, whereby the same is firmly locked and secured against any motion whatever.

2. In a nut-lock substantially as herein dcscribed, the combination, with a V-spring formed by bending a steel plate and provided with two openings and the inclined thread cut on the outer arm of the V-spring, of the springs deflected at the point ot' incison on the inner arm thereof, operating together upon a bolt and primary nut fitted thereon to bind the nut and lock the same by means of the lcompound frictional contact exerted on the nut and bolt, as set forth.

3. In a nut-lock, the combination, with a V- kspring formed by bending a steel plate, of

two deilected springs produced by making an incision at the outer edge of th`e inner arm of the V-spring, theV outer arm of said springplate being provided with althreadto engage the bolt, voperating substantially for the purpose and iu the manner herein specified;

4. In a nut-lock, the combination, with a bolt and a nut, of the compoundspring-plate fitted on said bolt and having an inner and outer arm, its inner arm provided'with deiected spring-prongs which respectively engage the nut and the ou ter arm, substantially as described.

5. In a nut-lock, the combination, with a bolt and a nut, of the compound spring-plate having an inner and outer arm and-in its outer arm an oblique thread which engages the bolt, the inner arm of said spring-plate being provided with spring-prongswhich engage, respectively, withthe nut and the outer arm, substantially as described.

6. As an-article of manufacture, the compound spring-plate herein described, having the inner and outer arms and threaded opening in thefouter arm thereof and its other arm provided at theV free edge with thevdeected spring-prongs, substantially as and for the purpose described.

In testimony that I claim the foregoing I hereto set my hand this, 27th day of November, A. D. 1890.

CHARLES C. DAVISON. In presence of;

JOSEPH A. HARRIS, GEORGE L. MAIN. 

